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(IAAC) M 1-9 (PK 212+04.1; PK 212+4.1) - 17.5" F/4.5
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 29 December 1997, about 01h00 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.31 with averted vision 5% of the time
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 3 (stellar stars until 180x)
Moon up (phase?): no
Instrument: Coulter 17.5" (445mm) F/4.5
Magnification: 211-400x
Filters used: OIII
Object: M 1-9 (PK 212+04.1; PK 212+4.1; ARO 131)
Category: planetary nebula
Constellation: MON
Object data: Vmag=13.4:; dim.12"x12"; type I PN; central star of Vmag=15.5;
discovered by Minkowski in 1946; ELCAT: [OIII, 495+501nm] = 10 x [Hbeta,
486nm].
RA/DE: 07h05.3m, +02°47' (2000); Uranometria 228
Description: at 400x and OIII, just non-stellar PN, faint to medium in
brightness, slightly brighter towards center; a double star mags15+15 is at
1.1'S.
I can provide a scanned drawing of M 1-9 to anyone who can read the binhex
encoding of Eudora (for Mac); just mail me to try
(ypothier@abi.snv.jussieu.fr), it works sometimes with other
configurations...
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
ypothier@abi.snv.jussieu.fr
ypothier@closun.snv.jussieu.fr
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,
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